Learn me on the PS2...

[JohnC]

Got lots of gift cards for my birthday, so I'm headed to Worst Buy this afternoon - will, at a minimum, be picking up a PS2 and GT4. What else do I need to get? I've got an HDTV (widescreen 30", 1080i) and 5.1 setup (well, getting there...), so is there anything else I need in order to take advantage of that? Memory cards - how much capacity do I need? Extra controllers - Dualshocks or something different?

I'm a complete n00b when it comes to consoles, so learn me good!